WASHINGTON — The day after the House cast historic votes to impeach President Trump, Speaker Nancy Pelosi put an abrupt halt on the proceedings, holding back from sending the charges to the Republican-led Senate in a politically risky bid to exert influence over the contours of an election-year trial. With some leading Democrats pushing to delay transmittal of the articles and others advocating that they be withheld altogether, the limbo is likely to persist until the new year. The House left town on Thursday for a two-week holiday recess without taking the votes to appoint impeachment managers, which is required...